please I want answer for all this questions...

Question

1) to creat a valid email link, displayed without an underline
<a href="______: abc@def. com"______" text-decoration:______"> Send </a>

2)Type in the name of the event attribute, that is fired when an element or text selection is being dragged
__________

3)To disable the text input field
<input type='text' __________>

4)Finish the name of the tag used to group related option
<opt______>

Answer 1

thank you so much

Answer 2

are sure for the answer of question 1... it is the answer in the second blank style?